Southwest of Portland and southeast of Tillamook, the Upper Nestucca OHV Trail System has over 100 miles of trails open to ATV riding. There are 3 staging areas with a trail network centered around each: Whipup Staging Area in the south, Elk Flat Staging Area in the center and Grassy Flat Staging Area in the north. The Whipup Staging area is 10 miles north of Willamina via Gilbert Creek Road and then FS 4-7-27 Road. The Elk Flat Staging Area is located on Bald Mountain Road at the southern intersection with Old Bald Mountain Road (aka FS3-6-14.2).The Grassy Flat Staging Area is located on Nestucca Access Road, about 1 mile north of Old Bald Mountain Road.
Overall, Grassy Flat Staging Area is the 8th most popular ATV riding trail of all 44 ATV trails in Oregon.